IICRC Odor Control Technician Comprehensive Test Review 2025 (Qns & Ans)

Odor Control Technician

Comprehensive Test Review (Qns & Ans)

2025



1. What is the primary component of human olfactory receptors?
- A) Proteins
- B) DNA
- C) Lipids
- D) Nucleic Acids
ANS: A) Proteins
Rationale: Olfactory receptors are specialized proteins that bind
odor molecules and mediate the sense of smell.


2. Which of the following compounds has the highest vapor
pressure and is most likely to cause a noticeable odor at low
concentrations?
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, - A) Ethanol
- B) Acetic acid
- C) Benzene
- D) Butanol
ANS: A) Ethanol
Rationale: Ethanol has a high vapor pressure which allows it to
be detected at low concentrations.


3. Which of the following is NOT a common source of indoor
odors?
- A) Mold
- B) Cigarette smoke
- C) Clean air
- D) Pet dander
ANS: C) Clean air
Rationale: Clean air does not generate any odors and is
therefore not a source of indoor odors.


4. What is the primary mechanism through which odors are
detected by the human olfactory system?
- A) Ion transport
- B) Chemical binding
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, - C) Light absorption
- D) Heat conduction
ANS: B) Chemical binding
Rationale: Olfactory receptors detect odor molecules through
chemical binding, which triggers the olfactory signal pathway.


5. Which equipment is commonly used to neutralize odors by
creating ozone?
- A) Air scrubber
- B) Ozone generator
- C) Dehumidifier
- D) HEPA filter
ANS: B) Ozone generator
Rationale: Ozone generators produce ozone (O3), which can
neutralize odors effectively.


Fill-in-the-Blank Questions


6. The sense of smell is often referred to as the __________
sense.
ANS: olfactory
Rationale: "Olfactory" specifically relates to the sense of smell.
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